Francois pin



T F.- PIN. PROTEOTING ENVELOP FOR FURNACES.

. APPLICATION FILED D110. 11, 1907. 907,280.

Patented Dec. 22, 1908.

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| I I l l l l l J I l I I I l 4||I F. PIN. PROTEGTING ENVELOP FOR FURNACES APPLICATION FILED DEG.11, 1907.

Patented Dec. 22, 1908.

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Patented Dec. 22, 1908.

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FRANCOIS PIN, OF GARENNES-COLOMBES, FRANCE.

PROTECTING-ENVELOP FOR FURNACES.

Specification of Letters Patent.

Patented Dec. 22, 1908.

Application filed December 11, 1907. Serial No. 406,017.

To all whom it may concern:

Be it known that I, FRANgoIs PIN, a citizen of the French Republic, and president of Garennes-Colombes, in the Seine Department, France, have invented certain new and useful Protecting-Envelops for Furnaces of Marine and other Boilers, of which the following is a specification.

This invention relates to improvements in baflles or envelops adapted to be disposed about the flues of boilers in a manner to protect the same and prevent the formation thereon of incrustation due to oil and other matter floating upon the surface of the water.

The device of my invention is designed to promote and maintain an effective circulation of the water in the boiler and is normally disposed below the surface thereof.

The device of my invention is so designed and arranged as to prevent access of oil and other floating matter to said flues when the water in the boiler descends below its normal level and below the upper portion of the baffles or envelops.

A further novel feature of the invention is to provide the baffles or envelops with a siphon arrangement designed to prevent the formation of a vacuum beneath the baflles or envelops and the invention comprises other features and details of construction which will be more fully described in connection with the accompanying drawing and will be more particularly pointed out and ascertained in and by the appended claims.

In the drawing: Figure 1, is a longitudinal sectional View of the device of my inventiontaken on line 1-1 of Fig. 2. Fig. 2, is a cross sectional View taken on line 22 of Fig. 1. Fig. 3, is an enlarged fragmen tary sectional view of a portion of the apparatus shown in Figs. 1 and 2. Fig. 4, is a cross sectional view of the device of my invention showing the applicationthereof to a burning boiler. Fig. 5, is a vertical longitudinal sectional view of the boiler shown in Fig. 4.

Like numerals of reference designate similar parts throughout the different figures of the drawing.

. Referring more particularly to Figs. 1 to 3 inclusive, 5, designates a fire flue of a boiler and 18 and 19 designate the end Walls thereof. The ordinary flues 17 are shown disposed abovesaid fire flue 5.-

The device of my invention consists of a battle or envelop 1, adapted to surround the upper portion of the flue 5 and extend downwardly laterally thereabout as far as conditions may require. Said battle or envelop 1, may extend substantially throughout the length of said flue as shown and is disposed or spaced apart from said flue to provide an intervening circulating chamber. The

end walls 4, of said envelop are turned downwardly or inwardly toward said flue 5 and in a manner to engage the same and support said envelop in a manner to provide an intervening circulating chamber of the desired size. Said walls 4:, preferably engage the outer peripheral portions of the flue 5, throughout the length of said envelop. If desired said envelop 1, may be built up or formed of a plurality of sections and the adjacent marginal portions of said sections may be bent upwardly and may be secured by bolts 3 as clearly indicated in Figs. 1 to 3. Means may be provided for anchoring said envelop l to hold the same in the position shown and in the certain embodiment of the invention said means consists of a plurality of bars 7 secured by bolts 8 to the lower portions of the flue 5, said bars 7 supporting stirrup 9 adapted to be secured to the lower marginal portion of the envelops 1.

It will be seen from the foregoing that the said envelops 1 provide a peripherally closed chamber about the flue 5 which chamher is open at the bottom and closed at the end and it will be obvious that the water in said chamber will be rapidly heated because of the close proximity to the flue 5 and will tend to rise because of the difference between its temperature and the temperature of the surrounding water outside of the chamber formed by said envelops. In order to permit the water to rise and thereby initiate and maintain the constant current or flow through said envelops 1 the latter are apertured at 10 and said apertures are provided with upwardly extending nozzle portions 11 which may if desired be riveted to the envelops 1 as clearly shown in Fig. 3. The upper marginal portions of the nozzles 11 extend somewhat above the uppermost parts of the envelops 1 and I desirably provide caps 13 for inclosing the terminals of said nozzles 11 and overhanging and extending downwardly around and below the upper terminals of said nozzles.

As will be seen by reference to Fig. 3, the upper margin of the nozzles is somewhat above the lower margin of the cap 13 and as indicated by the arrows the water will travel upwardly to said nozzles until it engages said cap 13, whereupon it will be deflected downwardly and will pass from beneath the lower margin of said cap 13. Supports 12 may be provided for anchoring said cap 13 to the upper marginal portion of the nozzle 11. It will be seen from the foregoing that when the level of the boiler in the water descends to a point below the top portion of the envelops 1 it will be prevented from gaining access to the chamber formed by the envelops 1 by reason of the fact that the upper portion of the nozzle 11 will be above the level of the water when said level reaches the lower level of the cap 13. Thus the oil and other floating matter cannot gain access to enlarge upon the upper side of the fine 5.

In order to prevent the formation of a vacuum beneath the cap 13 or to prevent the collection thereunder of a body of steam or air, means is provided which in the present embodiment of the invention consists of a plug 14 which is screw threaded into the top of the cap 13 and is provided with a central bore communicating at its lower end with said cap and its upper end with the downwardly inclined passages 15. In the form shown the central bore and the passages 15 respectively form the long and short limb of a siphon but it will be understood that a siphon is not an essential feature of the present invention. The clownward inclination of the passages 15 efiectively prevent ingress to the interior of the cap 13 of oil and other floating matter when the water level in the boiler descends to point below said cap as will be clearly seen by reference to Fig. 3.

In Figs. 4 and 5 the application of my invention is shown to a marine boiler in which there are three fire flues designated at 5, 5 and 5 respectively each flue being provided with a baffle or envelop similar to that shown in Figs. 1 to 3 inclusive. Fig. 4:, clearly indicates the manner in which the water in the boiler circulates through said baffles or envelops.

I claim 1. A boiler provided with a flue, an envelop or baffle surrounding the upper portion of said flue and comprising a plurality of united sections, the sections at the end of said envelops having flanges resting on said flue to space said envelops apart therefrom and form an intervening chamber, means for anchoring said envelops to said flue, each of said sections having an upwardly projecting nozzle, and a cap for each nozzle spaced apart therefrom to provide a passage for steam and water, the lower margins of said cap projecting below the upper margins of said nozzle.

2. A boiler comprising in combination, a flue, a baffle or envelop disposed about the upper portion of said flue and extending downwardly laterally thereof, said envelop comprising a plurality of sections, the end section having marginal walls engaging said flue to space said envelop apart therefrom and form an intervening chamber, each of said sections being provided with an upwardly projecting nozzle, and a cap for each nozzle spaced apart therefrom to form a passage for steam and water, the lower margin of said cap projecting below the upper margin of said nozzle, and siphon plugs for said cap substantially as described.

3. A boiler comprising in combination, a

flue, a baffle or envelop surrounding the upper portion of said flue and extending downwardly laterally thereof, said envelop having end walls engaging said flue to space said envelop apart therefrom and form an intervening chamber, said envelop having a plurality of upwardly projecting nozzles, and a cap for each nozzle spaced apart therefrom to form a passage for steam and water, the lower margins of said cap. extending below the upper margins of said nozzles, and siphon means for said cap.

4. A boiler comprising in combination, a flue, an envelop or baffle surrounding the upper portion of said flue and spaced apart therefrom to form an intervening chamber, said envelop having a plurality of upwardly projecting nozzles, a cap surrounding each nozzle and spaced apart therefrom to form a passage for steam and water, said caps having their lower margins extending below the upper margins of said nozzles, and siphon means for said cap substantially as described.

5. A boiler comprising in combination, a flue, a baflie or envelop surorunding one portion of said flue and spaced apart therefrom to form an intervening chamber, said envelop being provided with a plurality of upwardly projecting nozzles, caps surrounding said nozzles and spaced apart therefrom to form a passage for steam and water, the lower margins of said caps extending below the upper margins of said nozzles, and siphon means for said caps.

6. A boiler comprising in combination, a flue, a baffle or envelop surrounding a portion of said flue and spaced apart therefrom to form an intervening chamber, said envelop being provided with a plurality of nozzles, caps for said nozzles provided with portions extending below the u per terminals of said nozzles, and means or preventing the formation of a vacuum under said caps.

7. A boiler comprising in combination, a flue, a baffle or envelop surrounding a portion of said flue and provided with an out-- let, means inclosing said outlets and projecting below the same, and siphon devices 10 for said means.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

FRANQOIS PIN.

Witnesses ADOLPHE STURM,

H. C. Coxn. 

